Crystal Field Theory
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CHXII09:COORDINATION COMPOUNDS

321881 Among the following correct statements are:
(I) \(\left[\mathrm{MnCl}_{6}\right]^{3-},\left[\mathrm{FeF}_{6}\right]^{3-}\) are paramagnetic having four and five unpaired electrons respectively.
(II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds.
(III) The crystal field splitting \(\Delta_{\circ}\), depends upon the field produced by the ligand and charge on the metal ion.

1 I, II
2 I, III
3 I, II, III
4 II, III
CHXII09:COORDINATION COMPOUNDS

321882 The correct order of ligands arranged in increasing field strength.

1 \({\mathrm{\mathrm{Cl}^{-} < { }^{-} \mathrm{OH} < \mathrm{Br}^{-} < \mathrm{CN}^{-}}}\)
2 \({\mathrm{\mathrm{H}_{2} \mathrm{O} < { }^{-} \mathrm{OH} < \mathrm{CN}^{-} < \mathrm{NH}_{3}}}\)
3 \({\mathrm{\mathrm{F}^{-} < \mathrm{Br}^{-} < \mathrm{I}^{-} < \mathrm{NH}_{3}}}\)
4 \({\mathrm{\mathrm{Br}^{-} < \mathrm{F}^{-} < \mathrm{H}_{2} \mathrm{O} < \mathrm{NH}_{3}}}\)
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321883 In which of the following coordination entities the magnitude \(\Delta_{0}\) (CFSE in octahedral field) will be maximum? (At. No. \(\mathrm{Co}=27\) )

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
3 \(\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\)
CHXII09:COORDINATION COMPOUNDS

321884 The incorrect statement among the following is

1 CFT consider the covalent character of bonding between ligand and central atoms
2 The colour of \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) changes on adding ethylene diamine
3 The magnitude of CFSE of octahedral complexes is higher than that of corresponding tetrahedral complexes
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) does not contain unpaired electrons
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CHXII09:COORDINATION COMPOUNDS

321881 Among the following correct statements are:
(I) \(\left[\mathrm{MnCl}_{6}\right]^{3-},\left[\mathrm{FeF}_{6}\right]^{3-}\) are paramagnetic having four and five unpaired electrons respectively.
(II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds.
(III) The crystal field splitting \(\Delta_{\circ}\), depends upon the field produced by the ligand and charge on the metal ion.

1 I, II
2 I, III
3 I, II, III
4 II, III
CHXII09:COORDINATION COMPOUNDS

321882 The correct order of ligands arranged in increasing field strength.

1 \({\mathrm{\mathrm{Cl}^{-} < { }^{-} \mathrm{OH} < \mathrm{Br}^{-} < \mathrm{CN}^{-}}}\)
2 \({\mathrm{\mathrm{H}_{2} \mathrm{O} < { }^{-} \mathrm{OH} < \mathrm{CN}^{-} < \mathrm{NH}_{3}}}\)
3 \({\mathrm{\mathrm{F}^{-} < \mathrm{Br}^{-} < \mathrm{I}^{-} < \mathrm{NH}_{3}}}\)
4 \({\mathrm{\mathrm{Br}^{-} < \mathrm{F}^{-} < \mathrm{H}_{2} \mathrm{O} < \mathrm{NH}_{3}}}\)
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321883 In which of the following coordination entities the magnitude \(\Delta_{0}\) (CFSE in octahedral field) will be maximum? (At. No. \(\mathrm{Co}=27\) )

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
3 \(\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\)
CHXII09:COORDINATION COMPOUNDS

321884 The incorrect statement among the following is

1 CFT consider the covalent character of bonding between ligand and central atoms
2 The colour of \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) changes on adding ethylene diamine
3 The magnitude of CFSE of octahedral complexes is higher than that of corresponding tetrahedral complexes
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) does not contain unpaired electrons
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CHXII09:COORDINATION COMPOUNDS

321881 Among the following correct statements are:
(I) \(\left[\mathrm{MnCl}_{6}\right]^{3-},\left[\mathrm{FeF}_{6}\right]^{3-}\) are paramagnetic having four and five unpaired electrons respectively.
(II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds.
(III) The crystal field splitting \(\Delta_{\circ}\), depends upon the field produced by the ligand and charge on the metal ion.

1 I, II
2 I, III
3 I, II, III
4 II, III
CHXII09:COORDINATION COMPOUNDS

321882 The correct order of ligands arranged in increasing field strength.

1 \({\mathrm{\mathrm{Cl}^{-} < { }^{-} \mathrm{OH} < \mathrm{Br}^{-} < \mathrm{CN}^{-}}}\)
2 \({\mathrm{\mathrm{H}_{2} \mathrm{O} < { }^{-} \mathrm{OH} < \mathrm{CN}^{-} < \mathrm{NH}_{3}}}\)
3 \({\mathrm{\mathrm{F}^{-} < \mathrm{Br}^{-} < \mathrm{I}^{-} < \mathrm{NH}_{3}}}\)
4 \({\mathrm{\mathrm{Br}^{-} < \mathrm{F}^{-} < \mathrm{H}_{2} \mathrm{O} < \mathrm{NH}_{3}}}\)
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321883 In which of the following coordination entities the magnitude \(\Delta_{0}\) (CFSE in octahedral field) will be maximum? (At. No. \(\mathrm{Co}=27\) )

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
3 \(\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\)
CHXII09:COORDINATION COMPOUNDS

321884 The incorrect statement among the following is

1 CFT consider the covalent character of bonding between ligand and central atoms
2 The colour of \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) changes on adding ethylene diamine
3 The magnitude of CFSE of octahedral complexes is higher than that of corresponding tetrahedral complexes
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) does not contain unpaired electrons
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CHXII09:COORDINATION COMPOUNDS

321881 Among the following correct statements are:
(I) \(\left[\mathrm{MnCl}_{6}\right]^{3-},\left[\mathrm{FeF}_{6}\right]^{3-}\) are paramagnetic having four and five unpaired electrons respectively.
(II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds.
(III) The crystal field splitting \(\Delta_{\circ}\), depends upon the field produced by the ligand and charge on the metal ion.

1 I, II
2 I, III
3 I, II, III
4 II, III
CHXII09:COORDINATION COMPOUNDS

321882 The correct order of ligands arranged in increasing field strength.

1 \({\mathrm{\mathrm{Cl}^{-} < { }^{-} \mathrm{OH} < \mathrm{Br}^{-} < \mathrm{CN}^{-}}}\)
2 \({\mathrm{\mathrm{H}_{2} \mathrm{O} < { }^{-} \mathrm{OH} < \mathrm{CN}^{-} < \mathrm{NH}_{3}}}\)
3 \({\mathrm{\mathrm{F}^{-} < \mathrm{Br}^{-} < \mathrm{I}^{-} < \mathrm{NH}_{3}}}\)
4 \({\mathrm{\mathrm{Br}^{-} < \mathrm{F}^{-} < \mathrm{H}_{2} \mathrm{O} < \mathrm{NH}_{3}}}\)
JEE Main - 2024
CHXII09:COORDINATION COMPOUNDS

321883 In which of the following coordination entities the magnitude \(\Delta_{0}\) (CFSE in octahedral field) will be maximum? (At. No. \(\mathrm{Co}=27\) )

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)
2 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)
3 \(\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\)
CHXII09:COORDINATION COMPOUNDS

321884 The incorrect statement among the following is

1 CFT consider the covalent character of bonding between ligand and central atoms
2 The colour of \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) changes on adding ethylene diamine
3 The magnitude of CFSE of octahedral complexes is higher than that of corresponding tetrahedral complexes
4 \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) does not contain unpaired electrons
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